package com.my.springboot.tuling.concurrent;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * 线程池
 *创建了两个线程
 */
public class ThreadPoolTest {
    public static void main(String[] args) throws InterruptedException {
        Long start = System.currentTimeMillis();
        final Random random = new Random();
        final List<Integer> list = new ArrayList<>();
        ExecutorService executorService = Executors.newSingleThreadExecutor();
        for (int i = 0; i < 100000; i++) {
            executorService.execute(new Runnable() {
                // 方法调用
                @Override
                public void run() {
                    list.add(random.nextInt());
                }
            });

        }
        executorService.shutdown();
        executorService.awaitTermination(1, TimeUnit.DAYS);
        System.out.println("时间：" + (System.currentTimeMillis() - start));
        System.out.println("大小：" + list.size());
    }
}
